Improvement in leather-dressing machines



V 4 Sheets--Sheet 1.4 0. C. SMITH. Leather Dressing-Machines.

Patented Dec. 22, 1874.

4 Sheets-v-Sheet 4. 0. C. S MIT H.

Leather Dressing-Machines. E N'o.15`7,939. Patented Dec. 22,1a74.

l mju @v2-@f w l i 4MM l Te 'Uivrrnn 'rA'rEs OLIVER O. SMITH, OF IPSWIOH, ASSIGNOR TO JAMES M. CALLER, OF SALEM,

MASSACHUSETTS.

IMPROVEMENT IN LEATHER-DRESSING MACHINES.

Specication forming part of Letters Patent No. 157,939, dated December 22, 1874; application filed l April 7, 1874.

To all whom t may concern:

Be it known that I, OLIVER C. SMITH, of Ipswich, in the county of Essex and State of Massachusetts, have invented an Improvemeut in Leather-Dressing Machines; and I do hereby declare that the following, taken in connection with the drawings which accompany and form part of this specification, is a description of my invention sufficient to enable those skilled in the art to practice it.

The invention relates particularly to an organization of mechanism in which there is used a rotary working cylinder or tool, having both a traverse Vmotion over the bed and a positive rotative movement during its contact with the skin or leather placed upon the bed, and in a direction opposite to that which it would receive by mere contact with the bed.

Such a machine is represented and described in United States Letters Patent No 138,874, and in my organization I prefer to use a tool not unlike the peculiar t'ool described in said patent, and also to use, in connection therewith, a rotary traversing grinder lap or cylinder, to set the edges of the blades of such tool during their respective rotative' movements. ln such patented machine the traverse movements are imparted to the tool by a ,long vibrating pendent arm, to the foot of which the tool-stock is jointed; and my organization is particularly intended to simplify that part of the patented. organization which relates to et'ecting the reciprocating movement of the tool-stock.

In my invention I hang the swing-frame from two slides, reciprocating upon two station ary rods or rails fixed to overhan ging arms extending from the main frame, as seen in United States Letters Patent No. 52,728, and I fix the swing-frame to one end of a long link, the opposite end of which is jointed to crankpins extending from crank-wheels on drivingshafts. I prefer to employ twin crank-Wheels and shafts, but a single wheel and shaft may be used. The link extends from the upper part of a swin g-frame, the latter being a rightangular extension from the link, or approximating thereto, and during the upper halfrotation of the crank-pins the link is kept at such an angle as to hold the tool entirely above or out of contact with the bed or the work placed thereon, the tool, while thus above the work, traversing over the bed from the inner to the outer end thereof, while during the other half-rotation of the bedthe link is at such an angle as to carry the tool into contact with the bed or work and hold it there during the movement of the tool from the outer to the inner end of the bed, the tool-stock in these movements sliding upon the guide rods orrails, substantially as shown in said United States Patent No. 52,728. The swing-frame is jointed to the slides running upon said rails, and the roll journaled in said frame has its positive rotative movements imparted to it by suitable connections with the driving shaft or shafts.

The drawing represents a machine embodying my improvements.

Figure 1 shows the machine in plan. Fig. 2 is a sectional elevation of it. Fig. 3 is a front elevation of it. Fig. 4 is a side elevation.

a denotes the main frame, having overhanging arms b, beneath which are fixed the horizontal rods or rails c, upon which travel the slides d, the swing-frame c being jointed to these slides and reciprocating over the bed j'. The swing-frame is iixed to or extends from one end of a link, g, whose opposite end is j jointed to a crank pin or shaft, It, connecting two crank-wheels, i k, on twin driving-shafts l m, the rotation of either or both of said driving-shafts imparting reciprocating movement to the swing-frame, to carry the rotary cylinder or tool p in one direction over and clear from the bed, and in the opposite direction in contact with the bed, as in the 138,874 patent. At the bottom of the swing-frame are bearings n, in which are journaled the gudgeons o ollthe working tool or cylinder p, and to this tool rotative movements are imparted, as follows:

The tool-shaft carries pulleys q, connected by belts r, with pulleys s on the pivot-shaft a2, and this shaft a2 carries a pulley, t, connected bya belt, u, with a pulley, o, on the crank-pin It. On the opposite ends of the pin h are pulleys w, against which are held belts x, that extend around stationary drums y and pulleys z, which pulleys z are friction-pulleys, and turn upon pins extending from ears a2, projecting FFICE.

from the crank-wheels, the pulleys w and u being so placed that the pulleys c are binders, holding the belts x in contact with the pulleys fw. As the drivin g-shaft and crank-wheels rotate rotation is imparted to the pulleys 'w through the frictional contact therewith of the belts and this rotation of the pulleys w is communicated, through the shaft h, pulley c, belt u, pulley t, shaft a2, pulleys s, belt r, and pulleys q, to the tool-shaft o and its tool.

The tool is preferably made with spiral blades b2, similar to the Enos blades, and the positive rotary motion imparted to the tool is in a direction opposite to that which it would acquire from frietional contact with the bed or work in its movement against the same. Parallel to the tool-shaft is a shaft carrying a reciprocating grinder wheel or lap, c2, arranged and operated substantially as shown in the Enos patent.

By means of the slide d the Working surface of the tool moves in a plane substantially parallel with the horizontal top of the bed. rlhe bed is jointed to the top of a vertical spindle, d2, extending through a stand, e2, and resting upon an arm, f2, extending from a shaft, g2, upon which shaft is a piece, h2, hav ing an arm, i2, upon which rests a projection from a foot-lever, k2, jointed loosely to the end of the shaft g2. Depression of this lever turns the shaft g2 and raises the spindle cl2 and the bed. Fixed on the spindle d2 is a plate, Z2, through the opposite ends of which extend screws m2, said screws being fastened to the bed and resting upon arms of levers n2, the opposite arms of which are weighted, so that the bed becomes a yielding bed, held up by' the weighted levers, and yielding against the upward stress exerted by these weights. To limit the extent of rise and fall of the bed adjustable pins o2 are connected with the piece h2, these pins bringing up against a stop, p2, as the foot-lever is depressed or released. To counterbalance the weight of the pulley appendage applied to the crank-wheels i 7c the opposite sides of such wheels are weighted, preferably by increasing the thickness of the castings, as seen at q2.

1. The tool-stock e, toolshaft o, pulleys q, belts r, pulley s, shaft a2, pulleys t, belt u, pulley c, shaft hf, pulleys w, pulleys z, belt m, stationary drum y, driving-shafts Z m, and wheels i le, combined and arranged to impart rotative movements to the tool, substantially as shown and described.

2. The crank-wheels fi k, shafts l m, link g, in combination with, and for operating, the swing-frame and its positively/actuated rotary reciprocating tool, substantially as shown and described.

3. The counterbalance weighted crankwheels, in combination with the shaft and its adjacent pulleys, and the reciprocating swingframe and rotary tool p, substantially as described.

Executed this 3d day of January, A. D. 1874.

O. C. SMITH.

Witnesses:

FRANCIS GOULD, M. W. FROTHINGHAM. 

